JP2001084064A - Computer system and extended device for computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a computer system capable of constructing required optional functional extension by the wasteless and economical constitution of an extended device and easily constructing a high performance system sufficiently utilizing the function of a personal computer(PC) body and having high operability and high functions and an extended device for the PC. SOLUTION: At the time of recognizing connection with a docking base 20 through an extended controller(EC) 103, a CPU 101 executes a power ON sequence based on a BIOS processing routine(RT) stored in a BIOS-ROM 102 and prepared for controlling an extended power supply. When an extended power supply confirmation signal PCONF and an extended power supply control signal EBPON are validated, an extended power supply control circuit (G2) 205 outputs an ON/OFF control signal EBPO to a power supply device 31 in an extended box 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a computer system provided with a detachable function expansion device, and a computer expansion device.

[0002] The present invention further relates to a computer extension device having a power-on sequence function by hardware of a docking station.

[0003]

2. Description of the Related Art Conventionally, as a docking configuration applied to the extension of functions of a personal computer, the mainstream is a two-device configuration including a personal computer main body and a docking base, and an expansion box can be detachably attached to the docking base. Even in the configuration described above, the configuration handles a pass-through signal that does not require power supply control.

As described above, conventionally, in the configuration in which the extension box is detachably attached to the docking base, since there is no power supply circuit on the extension box side, there is no need to consider a power supply sequence or the like at all. Although the configuration is simple, in terms of function expansion, even when using the docking base with an expansion box, there is not much difference from using only the docking base, and the expansion box is selectively used. However, there is a problem that the demands cannot be sufficiently satisfied in order to improve the functions and performance of the system. In recent years, in particular, the processing capacity of the personal computer itself has been remarkably improved, and various expansion devices have emerged along with this. However, as described above, in the conventional configuration, the expansion box can be detachably attached to the docking base. Even in the case of using only the docking base, there is not much difference in terms of function expansion, and the demand for building a desired high-functionality and high-performance system that fully utilizes the functions of the personal computer body Has not been able to respond sufficiently.

[0005]

As described above, conventionally, in a configuration in which an extension box is detachably mounted on a docking base, there is no power supply circuit on the extension box side. Although the device configuration is simple, there is no great difference in terms of function expansion from the case where the docking base is used with the expansion box attached to the case where only the docking base is used. In constructing a desired high-performance and high-performance system that makes full use of functions, there has been a problem that it is not possible to sufficiently meet the demands.

The present invention has been made in view of the above circumstances,
Any desired function expansion can be constructed with an economically advantageous expansion device configuration without waste, and an easy-to-use, high-performance, high-performance system that makes full use of the functions of the personal computer body can be easily constructed. It is an object of the present invention to provide a computer system and a computer expansion device that can be used.

Further, the present invention provides a first extension device corresponding to a docking base that extends the function of the computer main body by being connected to the computer main body, and a function of the computer main body connected to the first extension device. In a computer system in which a second expansion device corresponding to an expansion box provided with a power supply device for further expanding a computer is used as an expansion device, a computer main body is connected to the first expansion device to which the second expansion device is connected. It is an object of the present invention to provide a computer system and a computer expansion device that can realize the power-on sequence of each of the above expansion devices by simple BIOS and hardware control.

[0008] The present invention also provides a first extension device corresponding to a docking base for extending the function of the computer main body by being connected to the computer main body, and a function of the computer main body connected to the first extension device. In a computer system in which a second expansion device corresponding to an expansion box provided with a power supply device for further expanding the expansion device is used as an expansion device, the attachment / detachment work of each of the expansion devices can be performed easily, quickly, and safely and securely. It is an object of the present invention to provide a computer system and a computer expansion device that can perform the same.

[0009]

According to the present invention, there is provided a first expansion device corresponding to a docking base for expanding the functions of a computer main body by being connected to the computer main body,
And a second expansion device corresponding to an expansion box provided with a power supply device connected to the first expansion device and further extending the function of the computer main unit, wherein the second expansion device corresponds to the second expansion device. The power-on sequence of each of the above-described expansion devices when the computer main body is connected to the first expansion device to which the expansion device is connected is a simple BIOS.
And hardware control.

[0010] The present invention also provides a hot docking / hot undulating function between the computer main unit and each of the above-mentioned expansion devices by providing the above-mentioned computer system with a function of detecting the attachment or detachment of the above-mentioned expansion device and notifying the occurrence of an event accompanying the detection. Docking, Worm Docking Worm and docking are enabled.

The present invention also provides the computer system, wherein the first expansion device implements a power on / off control and a power state detection function of a power supply device provided in the second expansion device. In addition to the above-mentioned hardware circuit, the second docking can be performed in each docking other than the cold docking and cold undocking between the above-mentioned expansion devices.
Is not recognized, but does not affect the operations of the computer main body and the first expansion device, and can be electrically and safely undocked.

According to the present invention, in the above-mentioned computer system, the first extension device controls on / off of a power supply device provided in the second extension device under control of a computer main body. And a control means for inputting and monitoring the status signal and forcibly turning off a power supply device provided in the second expansion device when the status signal indicates an abnormality, the second expansion device In the state where the first expansion device to which the is connected is docked to the computer main body, when an operation or circuit abnormality occurs in the power supply circuit of the first or second expansion device, the abnormality is detected. It is characterized by realizing a highly safe docking and undocking mechanism that can detect and quickly turn off the power by hardware control.

According to the present invention, in the above-mentioned computer system, each of the extension devices has ID information storage means, for example, composed of an EEPROM, in which unique ID information is stored. I ² C
A highly secure function expansion mechanism is realized as a configuration that can read ID information stored in the ID information storage means via a serial bus such as a bus and determine whether or not a proper expansion device is connected. And a security function can be easily added.

Further, according to the present invention, in the above-mentioned computer system, the setting information from the computer main body can be stored in each of the extension devices by the internal operation power supply even when the computer main body is not connected. It has an I / O expander (general-purpose port) and maintains the previous setting state even if the computer main body is disconnected, so that even when the computer main body is not connected, it controls the power supply circuit of each of the above-mentioned expansion devices. It is possible to maintain the state, for example, the WOL (Wa) of a LAN or a PCI card.
When the “ke ON Lan” function is enabled, even if the computer is disconnected (undocked), the previous setting state can be continuously maintained, and therefore, when the computer is connected again, it is necessary to re-enable the WOL. It is characterized by realizing an easy-to-use system.

According to the present invention, in the above-mentioned computer system, each of the expansion devices has a serial PCI bus connection means, and the connection of the serial PCI bus is provided in the second expansion device. By controlling connection / disconnection based on the status signal of the power supply device, a bus interface of, for example, a PCI bus between the computer main body and the first expansion device, and the first expansion device and the second expansion device are connected. A similar bus interface with the extension device can be connected / disconnected without affecting the operation of the computer main body.

Having the above-described functions, a first expansion device corresponding to a docking base that expands the functions of the computer main body by being connected to the computer main body, and a first expansion device connected to the first expansion device. In a computer system in which a second expansion device corresponding to an expansion box provided with a power supply device for further expanding the functions of the computer main unit is used as an expansion device, any desired function expansion is economically advantageous without waste. An easy-to-use, high-performance, high-performance system that can be constructed with an extended device configuration and that makes full use of the functions of the personal computer body can be easily constructed. In addition, the power-on sequence of each of the expansion devices when the computer is connected to the first expansion device to which the second expansion device is connected can be realized by simple BIOS and hardware control. Furthermore,
It is possible to easily and quickly perform the attachment / detachment work of each of the above-mentioned extension devices, and furthermore, safely and securely, and to construct a system that is easy to use.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 5 are block diagrams each showing a configuration of a main part in an embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a personal computer main body (PC main body) having an extension connector (CN) for connecting to a docking base. Reference numeral 20 denotes a docking base which is connected to an extension connector (CN) of the personal computer body 10, and has a cable connection connector for connecting an extension box. An extension box 30 is connected to the docking base 20 using a cable with connector (CB), and incorporates a power supply device described later.

1A, 2A, 3A and 101 to 11
0 is a component of the personal computer body 10, 1A is a PCI bus, 2A is an I2C bus, and 3A is an ISA bus.

A CPU 101 controls the entire system.
Here, in accordance with the connection confirmation of the docking base 20, a system power control process including a power-on sequence as shown in FIG. 2 according to a BIOS processing routine (RT) for extended power control stored in the BIOS-ROM 102 Execute

Reference numeral 102 denotes a BIOS-ROM in which various control programs executed by the CPU 101 are stored. Here, a BIOS processing routine (R) for controlling the power supply of the extension apparatus for realizing the power-on sequence shown in FIG.
T) is stored, and the ISA bus 3A, ISA-PCI bus bridge (ISA-PCI BRIDGE) 107, P
CI bus 1A, PCI bus bridge (PCI BRID
GE) 108 and the like.

Reference numeral 103 denotes an extension controller (EC) for performing extension control including power control of the docking base 20 and the extension box 30.
Various signals described later are exchanged between the docking base 20 and the extension box 30 via the 2C bus 2A.

Reference numeral 104 denotes a DC power input unit (DC-IN) for inputting DC power (DC power) output from an AC adapter (not shown). Reference numeral 105 denotes a built-in secondary battery (BATT). DC power is output to the power supply line (DL) via the power supply line (DL).

Reference numeral 106 denotes a DC power supply on the power supply line (DL), an operation Vcc power supply, and an extension power supply (L5).
V) and D for generating a backup power supply (B5V)
C / DC converter, extended controller (EC)
103, an extended power supply control signal (DOCV
ON), the output of the extension power supply (L5V) is controlled.

Reference numeral 107 denotes a PCI bus 1A and an ISA bus 3A
ISA-PCI bus bridge (ISA-P
CI BRIDGE), 108 is a PCI bus 1A and CP
It is a PCI bus bridge (PCI BRIDGE) that connects to U101 (CPU bus).

Reference numeral 109 denotes an I driven by a power supply (S5V) which is always supplied irrespective of ON / OFF of a power switch.
O-control circuit (IO-CONT). Here, a detachment detection signal (E-CONT) input through an extension connector (CN) is provided.
JC) and connection detection signals (DOCT1, DOCT2)
The state of attachment / detachment of the docking base 20 is monitored by, for example, and the occurrence of an event according to the state of attachment / detachment is monitored by the expansion controller (E).
C) Notify 103.

Reference numeral 110 denotes a bus switch (QS) provided on the PCI bus 1A connected to the docking base 20.
W), and a power supply confirmation signal (P
Upon receiving a control signal from a circuit (not shown) generated by CONF or the like, the PCI buses 1A and 1B are connected / disconnected.

Reference numerals 1B, 2B, and 201 to 214 are components of the docking base 20, respectively.
1B is a PCI bus, and 2B is an I2C bus. Reference numeral 201 denotes a DC power input unit (DC-IN) for inputting DC power (DC power) output from an AC adapter (not shown);
Reference numeral 2 denotes a DC power supply output from the DC power input unit (DC-IN) 201 in accordance with an expansion power control signal (LAUXON) output from an I / O expander (GPIO) 203 to be described later, and an internal expansion operation power supply. (LAUX3
V) to generate a DC / DC converter.

Reference numeral 203 denotes an I / C connected to the I2C bus 2B.
O expander (GPIO), and the internal power supply (LS5V) generated based on the DC power output from the DC power input unit (DC-IN) 201 causes the personal computer main body 10 to be disconnected. This is a general-purpose port that holds setting information.

Reference numeral 204 denotes an extended power control circuit (G1) which is output from the DC / DC converter 202 in accordance with an extended power control signal (DOCPWN) output from the extended controller (EC) 103 provided in the personal computer body 10. Internal expansion power supply (LAUX3
V), an operation power supply for extension (L3V) is generated, and the supply state of the internal power supply is determined by an extension power supply confirmation signal (PC
ONF) to the extended controller (EC) 103 of the personal computer 10.

Reference numeral 205 denotes an extended power supply control circuit (G2), which is an extended power supply control signal (EBPON) output from an I / O expander (GPIO) 203;
The power supply 301 provided in the extension box 30 according to the extension power supply confirmation signal (PCONF) output from the
A power supply state signal (EPCN) that is output from the power supply device 301 and that indicates whether power is normally supplied or not is generated.
Based on F), the output of the on / off control signal (EBPO) of the power supply device 301 is controlled.

Reference numeral 206 denotes the personal computer main body 10.
PCI bus 1A and docking base 2
0 to the PCI bus 1B provided in the expansion box 30 via a cable with connector (CB).
A serial PCI bus bridge (PCI BRIDGE) for connecting to a bus, which is connected / disconnected by a power supply state signal (EPCNF) sent from a power supply device 301 provided in the extension box 30, and The serial PCI bus bridge (PC
IBIDGE) 303 via a PCI serial bus PCI bus 1B (S), 1C (S).

Reference numeral 207 denotes an I2C bus 2B provided on the docking base 20 and an I2C bus 2B provided on the extension box 30.
A bus switch (Q-SW) that controls connection / disconnection of the C bus 2C with a power supply state signal (EPCNF) transmitted from a power supply device 301 provided in the expansion box 30.

Reference numeral 208 denotes a LAN controller (LAN-C)
ONT), 209 is a USB device connection unit (USB-HU)
B) and 210 are eject switches (Eject-SW) that are turned on / off when the docking base 20 and the personal computer main body 10 are attached and detached. The attachment / detachment detection signal (EJC) obtained from the eject switch (Eject-SW) 210 together with the connector connection detection signals (DOCT1, DOCT2) together with the IO control circuit (ID-CONT) 10 of the personal computer body 10
9 is input.

Reference numeral 211 denotes an EEP-ROM in which ID information unique to the docking base 20 is stored and accessed by the CPU 101 of the personal computer main body 10 via the I2C buses 2A and 2B.

Reference numeral 212 denotes a LAN connector (LAN-C).
N) and 213 are LAN controllers (LAN-CON
T) 208 an EEP-ROM, and 214 a LAN controller (LAN-CONT) 208 bus switch (Q-ROM).
SW).

1C, 2C, and 301 to 311 are components of the expansion box 30, respectively.
Is a PCI bus, and 2C is an I2C bus. Reference numeral 301 denotes a power supply (PO) serving as an internal power supply unit of the extension box 30.
WER SUPLY) and the docking base 20
On / off control is performed by an on / off control signal (EBPO) input from the controller, and the operating power supply (E12VP, E12VM, E5V) is supplied to the internal circuit module and the extension device.
, Etc.), and outputs a power supply status signal (EPCNF) indicating whether or not the power supply is performed normally.

Reference numeral 302 denotes an I / C connected to the I2C bus 2C.
O expander (GPIO), and the power supply 30
This is a general-purpose port that retains setting information even when the personal computer main body 10 is disconnected by the operation power supply (E5V, E3V) output from the terminal 1.

303 is an I / O expander (GPIO)
In response to a signal output from the power supply 302 and indicating that all power supplies have been turned on, a serial PCI bus bridge (PCI BRIDG) provided in the docking base 20 is received.
E) PCI serial bus PCI bus 1B with 206
(S), Serial P for bus connection via 1C (S)
It is a CI bus bridge (PCI BRIDGE).

Reference numeral 304 denotes an IDE slot (IDE-SLO)
T1, IDE-SLOT2) 305, 306, an IDE controller (IDE-C) for controlling devices mounted
ONT), 307 and 308 are PCI slots (PCI-SLOT1, PCI-SL) in which PCI devices are mounted.
OT2).

Reference numeral 311 denotes an EEP-ROM in which ID information unique to the extension box 30 is accessed by the CPU 101 of the personal computer main body 10 via the I2C buses 2A, 2B, 2C.

FIG. 2 shows a BIOS processing routine (R) stored in the BIOS-ROM 102 for controlling the extended power supply.
It is a flowchart which shows the power-on sequence according to T).

FIGS. 3 and 4 are diagrams showing the docking state in each status for explaining the operation in the above embodiment.

The operation in the embodiment of the present invention will now be described with reference to the above-mentioned drawings.

First, referring to FIG. 1 and FIG.
The operation in the embodiment will be described.

In the first embodiment, when the personal computer body 10 is docked to the docking base 20 to which the expansion box 30 is connected, the power-on sequence of the docking base 20 is realized by the minimum necessary BIOS operation.

The personal computer body 10 has an extension controller (EC) 103 for controlling the power of the extension device. The CPU 101 can perform BIOS control of the extended controller (EC) 103 via the ISA bus 3A. Specifically, the power supplies of the docking base 20 and the expansion box 30 are all turned on only by the BIOS operation shown in FIG. This power control is actually performed during the confirmation operation or the like, but here, only the main operation for the power control will be described.

When the personal computer main body 10 is connected to the docking base 20, the connection state is detected by the IO control circuit (ID-CONT) 109, and the occurrence of an event according to the connection / removal state is performed by the expansion controller (E).
C) 103 is notified.

The CPU 101 is an extended controller (EC)
Upon recognizing the connection to the docking base 20 via the connection 103, a power-on sequence as shown in FIG. 2 is executed in accordance with a BIOS processing routine (RT) for extended power control stored in the BIOS-ROM 102.

In this process, first, the extended power supply control signal (DOCVON) is made valid (for example, high level), and the DC / D signal is supplied by the extended power supply control signal (DOCVON).
The C converter 106 is activated, and the extension power (L5V) output from the DC / DC converter 106 is supplied to the docking base 20 (step S1 in FIG. 2).

Next, it is determined whether or not DC power is supplied to the DC power input section (DC-IN) 201 of the docking base 20 (step S2 in FIG. 2). The power-on sequence is terminated without performing the processing of (1).

When the DC power is supplied, the docking base 20 has an I / O expander (GPIO).
The extended power supply control signal (EBPON) and the extended power supply control signal (LAUXON) are made effective via 203, the DC / DC converter 202 is activated by the extended power supply control signal (LAUXON), and the output power of the extension power supply (LAUX3V) is controlled. (Step S3 in FIG. 2).

When the extension power supply (LAUX3V) is output, the extension power supply confirmation signal (PCONF) becomes valid, and this state is notified to the extension power supply control circuit (G2) 205 and the extension controller of the personal computer body 10 (EC) 103 is notified.

The extended power supply control circuit (G2) 205 sends an on / off control signal to the power supply device 301 of the extension box 30 when the extended power supply confirmation signal (PCONF) and the extended power supply control signal (EBPON) become valid. (EBP
O) is output.

On the other hand, the extended power supply confirmation signal (PCON
F) is input to the extended controller (EC) 103 of the personal computer main body 10, and the extended power control signal (D) is transmitted through the extended controller (EC) 103.
OCPWN) and outputs the extended power control signal (DO).
CPWN), an expansion operation power supply (L3V) is generated from the expansion power supply (LAUX3V) via the expansion power supply control circuit (G2) 205 (step S4 in FIG. 2).

Built-in power supply 301 of expansion box 30
Is an on / off control signal (EBP) of the power supply device 301.
O), the operation power supply (E12VP, E12V
M, E5V, etc.), and supplies the power to the internal circuit modules and extension devices. Further, when the power supply is normally performed, a high-level power supply state signal (EPCNF), for example, indicating the fact is output.

The high-level power supply state signal (EPCN)
F), the serial PCI bus bridge (PCI BRIDGE) 20 provided on the docking base 20
6, and the bus switch (Q-SW) 207 respectively perform bus connection, whereby the PCI buses 1B and 1C are connected to the serial PCI bus bridge (PCI BRIDGE) 20.
6 and 302, and the I2C buses 2B and 2C are connected to a LAN controller (LAN-CON).
T) 208 to be bus-connected.

With the above-described extended power supply control, the extension box 30 can be easily and minimally controlled by the BIOS control.
By connecting the personal computer main body 10 to the docking base 20 to which the is connected, the power-on sequence of the docking base 20 and the expansion box 30 is quickly and safely executed. In addition, since the minimum required BIOS is involved in addition to the pure hardware, it is possible to easily notify the OS, the driver, the utility, and the like at the time of docking. Further, by adding a BIOS and hardware for performing the above-described power-on sequence, power control of the expansion box 30 provided with a safety mechanism by hardware can be realized, thereby affecting interface control during docking. The expansion box 30 can be easily used without any difficulty.

Next, the operation of the second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, when the personal computer main body 10 is connected to the docking base 20 to which the extension box 30 is connected, a signal for detecting the connection state and the state of this signal are observed, A docking base 20 to which the expansion box 30 is connected and the personal computer main unit 10 by a circuit (IC) for notifying the expansion controller (EC) 103 of the occurrence of an event according to
Worm docking and worm undocking are possible.

The I / O control circuit (ID-CONT) 109 provided in the personal computer main body 10 has a detachment detection signal (E-CONT) input through the extension connector (CN).
JC) and connection detection signals (DOCT1, DOCT2)
The state of attachment / detachment of the docking base 20 is monitored by, for example, and the occurrence of an event according to the state of attachment / detachment is monitored by the expansion controller (E).
C) Notify 103.

The connection detection signals (DOCT1, DOCT1)
According to 2), the personal computer body 10 is
Status S0 by system data definition according to I specification
In this state, or in the status S3 or the status S4, the event of being connected (docked) can be transmitted to the extended controller (EC) 103. Therefore, hot docking and worm docking are possible.

The docking base 20 has an eject switch (Eject-SW) 210. The change in the state of the eject switch (Eject-SW) 210 can also be confirmed by the IO control circuit (ID-CONT) 109, and similarly, the extended controller (EC) 103
Will be notified. This eject switch (Eject-
SW) 210 is effective at the time of the system S0, and when the eject switch (Eject-SW) 210 is turned on, an eject can be requested to the OS.
This is equivalent to an undock request by the OS. Also,
The undock in the system S3 and the system S4 is notified to the extended controller (EC) 103 by the connection detection signals (DOCT1, DOCT2) described above.

At the time of the system S0, in response to the above-described eject request, the OS issues a notice (through the screen) that the necessary operation can be normally completed and then ejected, so that there is no problem if undocking is performed thereafter. In the system S3 and the system S4, no communication is performed between the personal computer main body 10 and the docking base 20 (except for the AOL (Alert ON Lan) relationship), so that even the state of connection change (detachment / desorption) is extended controller ( There is no problem if it can be reported to EC) 103. As described above, hot undocking and worm undocking can be performed.

As described above, the docking base 20 has the eject switch (Eject-SW) 210, and the power (S5V) constantly supplied to the personal computer main body 10 regardless of whether the power switch is on or off.
, And a connection detection signal (DJ) input through the expansion connector (CN).
Docking base 20 by OCT1, DOCT2, etc.
The docking base 20 to which the extension box 30 is connected and the personal computer are provided by providing an IO control circuit (ID-CONT) 109 for monitoring the attachment / detachment state of the extension box and notifying the extension controller (EC) 103 of the occurrence of an event according to the attachment / detachment state. In any state of the system, the connection status with the main body 10 is notified to the BIOS by hardware, so that hot docking / hot unlocking, worm docking / worm unlocking becomes possible.

Next, the operation of the third embodiment of the present invention will be described with reference to FIGS. 1, 3 and 4.

In the third embodiment, the docking base 2
0 and the expansion box 30 are directly driven by an internal power supply source regardless of whether or not the personal computer main body 10 is connected to the personal computer main body 1.
It is provided with I / O expanders (GPIO) 203 and 302 for holding the setting state even when the connection state is 0 or not connected, and the expansion box 30 can only perform the cold docking and the cold docking with the docking base 20. When the docking is performed in the state described above, the expansion box 30 is not recognized, but the operation of the personal computer body 10 and the docking base 20 is not affected. When undocked from another state, the personal computer body 10 A system that can be locked while accessing the extension device, but can be safely undocked electrically is realized.

Here, the case where the extension box 30 is docked will be briefly described.

To make the extension box 30 recognized,
A power supply device (POWER SUPLY) 301 serving as a built-in power supply unit of the expansion box 30 must be turned on. To do so, the power supply 301 is turned on / off.
The off control signal (EBPO) needs to be activated, and this can be controlled by the extended power control signal (EBPON) output from the I / O expander (GPIO) 203 provided on the docking base 20. . Focusing on this signal, the expansion box docking in each status of the personal computer main body 10 is summarized as shown in FIG.

Next, a brief description will be given of the case where the extension box 30 is undocked.

When the extension box 30 is removed, the on / off control signal (EBPO) of the power supply 301 is automatically invalidated (low level). Controlled off.

The power supply 301 is connected to an AC
When power is supplied, an expansion power supply (EAUX5V) is output regardless of the on / off state of the power supply device 301, and this power supply is used as an I / O expander (GPIO) 302.
Is supplied to FIG. 4 shows a summary of the case where the expansion box 30 is detached at each status under the state where the personal computer main body 10, the docking base 20, and the expansion box 30 are connected.

As described above, the docking base 20 and the expansion box 30 hold the setting state even when the personal computer body 10 is not connected to the I / O.
With the O-expanders (GPIO) 203 and 302, the expansion box 30 can only perform cold docking and cold undocking with the docking base 20, but the expansion box 3 can be docked in any other state.
0 is not recognized, does not affect the operation of the personal computer main body 10 and the docking base 20, and when undocking from another state, the personal computer main body 10 is locked while accessing the expansion-side device. However, it is possible to realize an easy-to-use system that can be safely undocked electrically.

Next, the operation of the fourth embodiment of the present invention will be described with reference to FIG.

In the fourth embodiment, the docking base 2 to which the expansion box 30 is connected has a configuration in which a power supply abnormal state is automatically detected on the expansion side and a corresponding circuit is provided.
When the power supply circuit of the docking base 20 or the expansion box 30 has an operational or hardware abnormality while the personal computer 10 is docked to the personal computer body 10, the abnormality is detected, and the power supply is immediately turned on by the hardware. It is possible to forcibly turn it off.

The following specifically shows how each power supply is controlled.

An extension power supply (LA) for the docking base 20
UX3V) and the expansion power supply (L3V)
The power state of the extended operation power supply (L3V) is determined by transmitting the extended power supply confirmation signal (PCONF) to the personal computer main body 10.
Can be recognized by observation with an extended controller (EC) 103. When the extended power supply confirmation signal (PCONF) is illegally invalidated (low level), the extended power supply control signal (LAU) is controlled via the I / O expander (GPIO) 203 under the control of the personal computer 10.
By disabling (low level) XON, it is possible to turn off the extension power supply (LAUX3V) and the extension operation power supply (L3V).

The power state of the extension power supply (L5V) is the same as Vcc of the personal computer main body 10 when the power supply is abnormal because the power supply is connected to the Vcc power supply line in the personal computer main body 10. And is recognized by the existing power supply monitoring function of the personal computer main body 10 (not shown).

Each power supply (EAUX5
V, E12VP, E12VM, E5V, etc.) are stored in the power supply device 30 serving as a built-in power supply unit of the expansion box 30.
1 can be recognized by the power supply status signal (EPCNF) output from the power supply 1. If an abnormality occurs in any of the power supplies, the power supply state signal (EPCNF) becomes invalid (low level), and the state of each power supply can be recognized from this signal state. Also,
In the embodiment of the present invention, the power supply state signal (EPCN)
When F) becomes invalid (low level), the signal causes the extended power supply control circuit (G2) 205 to turn on / off the power supply device 301.
Disable (low level) the off control signal (EBPO),
The extension box 30 is turned off.

As described above, by providing the detection circuit for the power supply on the extension side, even if a power supply abnormality occurs, the power supply can be quickly turned off without harm to the system and the user. There are two reasons for the power failure. There is a case where the circuit failure occurs only by the user without doing anything. A power failure may occur as a result of attachment / detachment or attachment / detachment of various extension devices. It has a system protection effect against all these abnormalities.

Next, the operation of the fifth embodiment of the present invention will be described with reference to FIG.

In the fifth embodiment, the docking base 2
0 and the extension box 30 store ID information unique to each device on the I2C buses 2B and 2C.
ROMs 211 and 311 are provided, and the CPU 101 controls the extended controller (EC) 103 and the I2C buses 2A and 2A.
B, 2C and can be accessed via
When an extension device (docking base 20, extension box 30), which is not supported by the personal computer main unit 10, is connected, this is detected, and erroneous use of the device is prevented, enabling highly secure operation.

An EEP-ROM 211 storing ID information unique to the docking base 20 is connected to the I2C bus 2B of the docking base 20, and ID information unique to the expansion box 30 is stored in the I2C bus 2C of the expansion box 30. EEP-ROM 311 is connected.

EEP provided on docking base 20
The ROM 211 is driven by a power supply (S5V) supplied from the personal computer main body 10 and constantly supplied irrespective of whether the power switch is turned on or off.
As long as the docking base power supply (S5V) of 0 is stabilized, the EEP-ROM 211 can be accessed from the extended controller (EC) 103 of the personal computer body 10. That is, before the power-on can described in the first embodiment, the EEP-ROM 211
You can check the contents of. At this time, if the docking base is not supported, the power supply to the docking base is prohibited by the BIOS control and the power-on control is not performed.

The EEP-R provided in the extension box 30
The OM 311 is a bus switch (Q-SW) 207 on the I2C bus 2B provided on the docking base 20 when AC power is supplied to the power supply device 301.
Is turned on, it is possible to access from the extended controller (EC) 103 of the personal computer body 10. At this time, the bus switch (Q-SW) 207
Indicates that the power supply status signal (EPCNF) is normal (high level)
Indicates the ON state, the I2C bus 2B,
A bus connection is made between 2Cs.

If the power supply of the expansion box 30 is not normally turned on, the EEP-ROM 31
1 cannot be read, and in that case, the extended controller (EC) 10
3 to docking base 20 I / O expander (G
PIO) 203 to access the extended power control signal (E
BPON) is forcibly disabled (low level), the on / off control signal (EBPO) of the power supply 301 is set to the switch-off control state (low level), and the power supply 301 of the extension box 30 is off-controlled. Will be possible.

Even if the power of the expansion box 30 is normally turned on, if the expansion box 30 is found to be an unsupported expansion box by reading the EEP-ROM 311, the expansion controller ( EC) 103 to docking base 20 I / O
The expander (GPIO) 203 is accessed to forcibly invalidate (low level) the extended power control signal (EBPON), and to turn on / off the control signal (E
BPO) is set to the switch-off control state (low level), and the power supply device 301 of the expansion box 30 can be turned off.

As described above, the EEP-ROM 2 storing the ID information unique to the device on each of the I2C buses 2B and 2C of the docking base 20 and the expansion box 30.
11 and 311 are provided so that the CPU 101 can access the extended controller (EC) 103 and the I2C buses 2A, 2B and 2C.
Even if an irregular docking base or an irregular expansion box that is not supported by the personal computer body 10 is connected, it is detected and the power is carelessly turned on with an irregular expansion system configuration. Inconvenience can be avoided, and only use in a regular extended system configuration can be always enabled.

Next, the operation of the sixth embodiment of the present invention will be described with reference to FIG.

In the sixth embodiment, as in the fifth embodiment, the docking base 20 and the extension box 30
EEP-RO on each I2C bus 2B, 2C
M211 and 311 are provided, and the CPU 101 operates the extended controller (EC) 103 and the I2C buses 2A, 2B and 2C.
, A security function can be added based on ID information.

That is, EEP-ROMs 211 and 311 are provided in the docking base 20 and the expansion box 30, respectively, and ID information is individually set, whereby
A system in which the power is not turned on except for a combination permitted by the user can be provided. As a result, information stored in a storage device or the like on the docking base side can be protected.

In the sixth embodiment, various functions can be expanded by expanding the functions of the fifth embodiment.

As a specific example, the docking base 2
0 and the information stored in the storage device or the like of the extension box 30 can be protected.

Further, it is possible to protect the docking base 20 and the expansion box 30 during standby in the WOL enabled state.

Further, even if an unauthorized (non-regular) personal computer is connected to the docking base 20, the docking base 20 and the expansion box 30 cannot be accessed. Can be banned.

The EEP-R of the docking base 20
It is also possible to take confirmation means such as writing the ID of the personal computer main body 10 into the OM 211 and setting the driver so as to always refer to the ID.

When the LAN function is used in an unacceptable combination, it is possible to notify the server as AOL.

Next, the operation of the seventh embodiment of the present invention will be described with reference to FIG.

The seventh embodiment is different from the docking base 2
0 and the expansion box 30 are directly driven by an internal power supply source regardless of whether or not the personal computer body 10 is connected to the personal computer body 1.
It has I / O expanders (GPIO) 203 and 302 for maintaining the setting state even when the connection state is 0 or not connected, and the power supply circuit control state of the docking base 20 and the expansion box 30 even when the personal computer body 10 is not connected. , So that, for example, LA
N or PCI card WOL (Wake ON L
an) When the function is enabled, even if the connection of the personal computer body 10 is once released, the state is maintained, and when the connection is made again, it is not necessary to re-enable the WOL, and therefore, the extension which is easy to use It can be a system configuration.

An I / O expander (GPIO) 203 is connected to the I2C bus 2B of the docking base 20.
An I / O expander (GPIO) 302 is connected to the I2C bus 2C of the extension box 30.

The I / O expander (GPIO) 203 of the docking base 20 has a DC power input section (DC-I
N) Since it is driven by the internal power supply (LS5V) generated from the DC power supply output from 201, it is possible to always maintain the state when the AC adapter is connected. When the personal computer body 10 is connected, WOL is controlled by the extended controller (EC) 103.
Extended power supply control signal (LAUXON) for enable
Is valid (high level), the valid (high level) state is maintained even when the personal computer body 10 is undocked. That is, the extension power supply (LAUX3V) is set to the output state, and the WOL-related logic of the LAN controller (LAN-CONT) 208 is enabled.

The I / O expander (GPIO) 302 of the extension box 30 can basically perform the same operation as the I / O expander (GPIO) 203. Power supply device 301 serving as built-in power supply unit of expansion box 30
When the AC power is supplied to the I / O via the AC cord, the extension power supply (EAUX5V) is output regardless of the on / off state of the power supply device 301.
The expander (GPIO) 302 can also hold the setting state. When the extended power control signal (LAUXON) is enabled (high level) to enable WOL under the control of the extended controller (EC) 103 when the personal computer main body 10 and the docking base 20 are connected, for example, the personal computer Even if the main body 10 is undocked, the valid (high level) state is maintained. That is, the extension power supply (LA
UX3V) to the output state, and
WOL of AN controller (LAN-CONT) 208
Relationship logic can be enabled.

As described above, the I / O expanders (GPIO) 203 and 302 are provided on the I2C buses 2B and 2C of the docking base 20 and the expansion box 30, respectively, so that the personal computer body 10 sets the I / O expanders (GPIO) 203 and 302. Further, even if the personal computer main body 10 is detached and attached, the respective circuit states of the docking base 20 and the extension box 30 are retained, and when the personal computer main body 10 is connected again, it is as if it were always connected. It becomes possible to operate.
Conversely, even when the connection between the docking base and the expansion box is out of specification, the state holding function of each of the I / O expanders (GPIO) 203 and 302 allows
An electrically safe connection state can be ensured.

Next, the operation of the eighth embodiment of the present invention will be described with reference to FIGS.

The eighth embodiment is different from the docking base 2 according to the eighth embodiment.
0, the expansion box connection end on the PCI bus 1A,
Serial PCI bus bridges (PCI BRIDGE) 206 and 303 are provided at the docking base connection end of the expansion box 30 on the PCI bus 1C, respectively.
The connection therebetween is connected by the PCI serial buses 1B (S) and 1C (S), and the bus connection between the personal computer main body 10 and the docking base 20 is connected without affecting the operation of the personal computer main body 10,
It is possible to operate.

A serial PCI bus bridge (PCI BRIDGE) 206 provided on the docking base 20
Receives the expansion power supply (L5V) and the expansion operation power supply (L3V), becomes operable, and disconnects the bus when the power supply state signal (EPCNF) from the power supply 301 indicates an abnormality. At this time, the bus switch (Q-SW) 207 on the I2C bus 2B also disconnects the bus according to the power supply status signal (EPCNF). Serial PCI bus bridge (PCI BRIDGE) 303 provided in the extension box 30
Is enabled by the power supply (E5V, E3V) output from the power supply 301 after the power supply of the docking base 20 is turned on. Thereby, the bus interface between the personal computer body 10 and the docking base 20, the docking base 20 and the extension box 30
Can be connected and operated without affecting the operation of the personal computer main body 10.

The docking base 20 having the functions of the above-described embodiments and extending the functions of the personal computer main body 10 by being connected to the personal computer main body 10, and the docking base 2
Expansion box 3 having a power supply 301 connected to the power supply device 0 to further expand the functions of the personal computer body 10.
In a computer system using 0 as an expansion device, any desired function expansion can be constructed with an economically advantageous expansion device configuration without waste, and the functions of the personal computer main body are fully utilized, and it is easy to use. A high-performance, high-performance system can be easily constructed.
In addition, the power-on sequence of each of the expansion devices when connecting the personal computer body 10 to the docking base 20 to which the expansion box 30 is connected is a simple BI
It can be realized by OS and hardware control. Further, the attachment / detachment work of each of the above-mentioned extension devices can be performed easily and quickly, and furthermore, safely and reliably, so that a user-friendly system can be constructed.

[0109]

As described above in detail, according to the present invention, any desired function expansion can be constructed with an economically advantageous expansion device configuration without waste, and the functions of the personal computer body are fully utilized. It is possible to provide a computer system and a computer expansion device that can easily construct a highly functional, high-performance system that is easy to use.

Further, a first expansion device corresponding to a docking base that is connected to the computer main body to expand the functions of the computer main body, and further connected to the first expansion device to further expand the functions of the computer main body. In a computer system in which a second expansion device corresponding to an expansion box provided with a power supply device is used as an expansion device, the computer system is connected to a first expansion device to which the second expansion device is connected. A computer system capable of realizing a power-on sequence of each expansion device with simple BIOS and hardware control, and a computer expansion device can be provided. In addition, since the BIOS is involved in the power-on sequence, it becomes easy to notify the OS, driver, and utility when docked.

Further, a first extension device corresponding to a docking base for extending the function of the computer main unit by being connected to the computer main unit, and further extending the function of the computer main unit by being connected to the first extension device. In a computer system in which a second expansion device corresponding to an expansion box provided with a power supply device is used as an expansion device, a computer capable of easily and quickly, safely and reliably mounting and demounting each of the above expansion devices. System and computer extensions can be provided.

Further, the computer system has a function of detecting the attachment / detachment of the extension device and a function of notifying the occurrence of an event accompanying the attachment / detachment. -A system that allows worm undocking can be easily constructed.

In the above-mentioned computer system, a hardware circuit for realizing a power on / off control and a power supply state detection function of a power supply device provided in the second expansion device in the first expansion device is provided. , The second expansion device is not recognized in each docking other than the cold docking and cold undocking between the expansion devices, and the operation of the computer main body and the first expansion device is affected. And a system that can be safely undocked electrically.

Further, in the above-mentioned computer system, under the control of a computer main body, the first expansion device controls on / off of a power supply device provided in the second expansion device, and A signal is input and monitored, and a control means for forcibly turning off a power supply device provided in the second expansion device when the status signal indicates an abnormality is connected to the second expansion device. In the state where the first expansion device is docked to the computer main body, when an operation or circuit abnormality occurs in the power supply circuit of the first or second expansion device, the abnormality is detected, and A highly safe docking and docking mechanism that can quickly turn off the power by wear control can be realized.

In the above-mentioned computer system, each of the extension devices has ID information storage means, for example, an EEPROM, which stores unique ID information, and the main body of the computer is, for example, an I ² C bus. As a configuration that can read the ID information stored in the ID information storage means via a serial bus, and determine whether or not a proper expansion device is connected, a highly secure function expansion mechanism is realized. And a security function can be easily added.

Further, in the above-mentioned computer system, the I / O extract which can store setting information from the computer main body to each of the expansion devices by the internal operation power supply even when the computer main body is not connected. It has a panda (general-purpose port) and retains the previous setting state even when the computer main body is disconnected, thereby maintaining the power supply circuit control state of each of the above-described expansion devices even when the computer main body is not connected. For example, when the WOL function of a LAN or a PCI card is enabled, even if the computer body is not connected (undocked), the previous setting state can be continuously maintained, and therefore, the connection can be made again. In this case, there is no need to re-enable the WOL, and an easy-to-use system can be realized.

In the above-mentioned computer system, each of the extension devices has a connection means for a serial PCI bus, and the connection of the serial PCI bus is established by the state of a power supply device provided in the second extension device. By controlling connection / disconnection based on signals, for example, a bus interface of a PCI bus between the computer main body and the first expansion device, and a connection between the first expansion device and the second expansion device. An easy-to-use system that can control connection / disconnection of the same bus interface without affecting the operation of the computer main body can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a system according to an embodiment of the present invention.

FIG. 2 is a BIO for power supply control in the embodiment.
9 is a flowchart showing a power-on sequence according to an S processing routine (RT).

FIG. 3 is a diagram showing a docking state in each status for explaining an operation in the embodiment.

FIG. 4 is a diagram showing a docking state in each status for explaining the operation in the embodiment.

FIG. 5 is a block diagram showing a configuration of a main part of the system according to the embodiment of the present invention.

[Explanation of symbols]

1A, 1B, 1C: PCI bus 2A, 2B, 2C: I2C bus 3A: ISA bus 10: Personal computer body (PC body) 20: Docking base 30: Expansion box 101: CPU 102: BIOS-ROM 103: Expansion controller ( EC) 104 DC input unit (DC-IN) 105 Built-in secondary battery (BATT) 106 DC / DC converter 107 ISA-PCI bus bridge (ISA-PCI)
BRIDGE) 108 PCI bus bridge (PCI BRIDGE) 109 IO control circuit (IO-CONT) 110 Bus switch (Q-SW) 201 DC input unit (DC-IN) 202 DC / DC converter 203 I / O expander (GPIO) 204 ... extended power supply control circuit (G1) 205 ... extended power supply control circuit (G2) 206 ... Serial PCI bus bridge (PCI BRI)
DGE) 207 Bus switch (Q-SW) 208 LAN controller (LAN-CONT) 209 USB device connection unit (USB-HUB) 210 Eject switch (Eject-SW) 211 EEP-ROM 212 LAN connector ( LAN-CN) 213 EEP-ROM of LAN controller 214 Bus switch (Q-SW) 301 Power supply (POWER SUPLY) 302 I / O expander (GPIO) 303 Serial PCI bus bridge (PCI BRI)
DGE) 304 IDE controller (IDE-CONT) 305 IDE slot (IDE-SLOT1) 306 IDE slot (IDE-SLOT2) 307 PCI slot (PCI-SLOT1) 308 PCI slot (PCI-SLOT2) 311 EEP -ROM

Claims (19)

[Claims] A first expansion device connectable to the computer main body; a second expansion device connectable to the first expansion device; and a second expansion device connected to the first expansion device. And a power control means for controlling power-on of the first expansion device and the second expansion device when the expansion device is connected to the computer main body. system. 2. A computer main body; a first expansion device connectable to the computer main body; a second expansion device connectable to the first expansion device; and the computer main body attached to the first expansion device. When the computer is connected, the computer main body performs power-on control of the first expansion device, and after the power-on, the first expansion device performs power-on control of the second expansion device. Computer system comprising means. 3. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. The second expansion device has a power supply device for supplying power for operation to an internal circuit module and an expansion device, and when the first expansion device is connected to the computer main body, Control means for executing a power-on sequence of the first expansion device; and control means for controlling the first expansion device to turn on a power supply device provided in the second expansion device in accordance with the power-on sequence. A computer system, comprising: 4. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. And means for monitoring a state of attachment / detachment between the computer main body and the first expansion device, and notifying a program processing unit of the computer main body of a system state accompanying the monitoring. Computer system. 5. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. A power supply device for supplying operation power to the internal circuit module and the expansion device and outputting a status signal indicating whether or not the power supply is normally performed, to the second expansion device. Control means for controlling on / off of a power supply device provided in the second expansion device to the computer main body; and inputting and monitoring the status signal via the first expansion device to monitor the status signal A control system for forcibly turning off a power supply device provided in the second expansion device via the first expansion device when a failure has occurred. 6. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. Each of the extension devices has an ID information storage unit storing unique ID information, and the computer main body reads the ID information stored in the ID information storage unit, and stores the ID information in the computer body. A computer system comprising an expansion device confirming means for judging whether a proper expansion device is connected or not. 7. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. A computer characterized in that each of the expansion devices has an IO expander that is directly driven by an internal power supply source and retains setting information even when the computer main body is disconnected. system. 8. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. A power supply device for supplying operation power to the internal circuit module and the expansion device and outputting a status signal indicating whether or not the power supply is normally performed, to the second expansion device. Each of the expansion devices has a serial PCI bus connection means for performing a PCI bus connection between the expansion devices, and when the status signal indicates a normal power supply status, the computer main body is connected to the first, second, or A computer system, wherein two expansion devices are bus-connected via the serial PCI bus. 9. A first expansion device having a computer main body, a connection means for connecting to the computer main body, and a second expansion device having a connection means for connecting to the first expansion device. A power supply device for supplying operation power to the internal circuit module and the expansion device and outputting a status signal indicating whether or not the power supply is normally performed, to the second expansion device. Each of the expansion devices has a serial PCI bus connecting means for performing a PCI bus connection between the expansion devices when the status signal indicates a normal power supply state. A computer system characterized by being connected to a cable by a bus structure. 10. An expansion device having a power supply device for supplying power to an internal circuit module and an expansion device, a docking base having connection means for the expansion device, and a connection means for the docking base. The computer main body executes a power-on sequence of the expansion device when the docking base is connected to the computer main body while the docking base is connected to the expansion device. Computer system. 11. A docking base to which an expansion unit is connected, wherein the docking base is connected to the docking base and an expansion unit to further expand a main body function used by connecting to the docking base is connectable as an expansion device. A computer which comprises: a detachment detecting means for detecting the detachment of the docking base; and a power control means for controlling a power supply for operating the docking base and the extension unit in accordance with the detachment detection of the docking base by the detachment detecting means. . 12. The power supply control means for an extension device including a power supply device provided in an extension unit connected to the docking base when the detachment detection means detects that the docking base is connected. 12. The computer according to claim 11, further comprising program control means for executing a power-on sequence. 13. When the docking base is detected by the attachment / detachment detection unit to detect that the docking base is connected, the power supply control unit executes a power-on sequence of a power supply for operating the docking base under BIOS control. The computer according to claim 11, wherein a power supply device provided in the extension unit connected to the docking base is controlled to be on by hardware control when the operation power supply is turned on. 14. The computer according to claim 11, further comprising means for issuing an event in accordance with a state of the docking base to which the extension unit is connected when the state of attachment / detachment is detected by the attachment / detachment detection means. 15. When the functions of the computer main body are expanded and the functions of the computer main body are further expanded, a serial bus is connected to the computer main body at a docking base to which a dedicated expansion unit containing a power supply device is connected. An IO expander that is connected via the power supply source and is directly driven by an internal power supply source to maintain a state even when the computer is disconnected from the computer main body; and the expansion based on an output signal of the IO expander. A circuit for generating a signal for controlling on / off of a power supply device provided in the unit. 16. A computer comprising: a docking base connected to the computer main body for expanding the functions of the computer main body; and an expansion unit connected to the docking base to further expand the functions of the computer main body. An extension device, comprising: a power supply device for supplying power for operation to an internal circuit module and the extension device to the extension unit, and outputting a status signal indicating whether or not the power supply is performed normally. A means for turning on a power supply device provided in the extension unit in accordance with power-on control of the computer main body; receiving a status signal from the power supply device provided in the extension unit, wherein the status signal is abnormal. Indicates a control means for forcibly turning off a power supply provided in the second expansion device. A computer extension device comprising: a step; 17. A computer comprising: a docking base that is connected to the computer main body to expand the functions of the computer main body; and an expansion unit that is connected to the docking base to further expand the functions of the computer main body. An extension device, wherein when the computer body is connected to the docking base to which the extension unit is connected, a serial bus interconnecting the computer body, the docking base, and the extension unit, and the docking base, IDs provided independently of the extension unit and connected to the internal serial bus
An extended device for a computer, comprising: information storage means. 18. An expansion unit incorporating a docking base that is connected to a computer main body to extend the functions of the computer main body, and a power supply device that is connected to the docking base to further expand the functions of the computer main body. An expansion device for a computer, comprising: a docking base to which the expansion unit is connected; and a serial bus that interconnects the computer main body, the docking base, and the expansion unit when the computer main body is connected. An IO that is provided independently of the docking base and the extension unit, is connected to an internal serial bus, and is directly driven by an internal power supply source to maintain a state even when the computer body is disconnected. It is characterized by comprising an expander Extension device of the computer. 19. A computer comprising: a docking base connected to the computer main body for expanding the functions of the computer main body; and an expansion unit connected to the docking base to further expand the functions of the computer main body. An extension device, comprising: a power supply device for supplying power for operation to an internal circuit module and the extension device to the extension unit, and outputting a status signal indicating whether or not the power supply is performed normally. The docking base and the extension unit have serial PCI bus connection means for making a PCI bus connection between the devices, and when the status signal indicates a normal power supply state, the docking base and the extension unit The serial PC
An expansion device for a computer, which is connected to a bus via an I bus.